Benzodiazepines can stay in your device for up to 10 days. Hair exam can present evidence the benzos for as much as 90 days. Details factors that impact detection time space body mass, duration of use, and drug properties.

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Benzodiazepines, such as Xanax and also Valium, are central nervous device depressants offered to treat anxiety, acute stress reactions and panic attacks.

Doctors generally prescribe benzos together a temporary therapy due to the fact that of the addictive nature of the drug. Physicians can determine if benzodiazepines are current in an individual’s system by performing blood tests, urine tests, hair tests and saliva tests.

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Currently among the many prescribed depressant medications, benzodiazepines space classified together Schedule IV medicine under the controlled Substances Act. Once benzos are mixed with other depressants such as alcohol and also prescription opioids, they become much more potent, increasing the hazard for serious or life-threatening complications.

Benzodiazepines such together Rohypnol are famous for facilitating sexual assaults. Saliva, blood and also urine tests deserve to determine if someone unknowingly consumed benzodiazepines.

Testing because that Benzodiazepines

Benzodiazepines will create a optimistic urine test an outcome as at an early stage as two to seven hours after an individual takes the drug. The drug clearance price is the length of time a benzodiazepine will stay detectable in the body, and it different from medicine to drug.

Long-acting benzos, such as Valium, deserve to stay in your device (urine) for as much as 10 days. Halcion and other short-acting benzodiazepines have the right to be detected because that up to two days.

How lengthy Do Benzos continue to be In her Urine?Type the BenzodiazepineDetection Time
Long ActingValium (diazepam)Up come 10 days
Nordiazepam
Intermediate ActingXanax (alprazolam)Up to 5 days
Ativan (lorazepam)
Serax (Oxazepam)
Restoril (temazepam)
Librium (chlordiazepoxide)
Klonopin (clonazepam)
Rohypnol (flunitrazepam)
Short ActingHalcion (triazolam)Up to two days
Dalmane (flurazepam)

Source: Mayo clinical Laboratories

People tested for benzodiazepines include athletes, medicine rehab clients, employees, hospital patients and military personnel.

Urine Tests

A to pee test complied with by a urinalysis is a common means to inspect for Xanax or other intermediate-acting benzos in one individual’s system. After the body metabolizes the drug, about one-fifth the the oral dose remains in the urine. Low-dose Xanax users might test confident for the medicine for increase to four days after ~ ingestion, and also heavy customers may produce a positive result for as much as a mainly after ingestion.

Hydration affects urine medicine tests because high liquid intake dilutes the drug and produces a false negative result.

Low sheep of benzodiazepines or lengthy intervals in between use may produce a an unfavorable result if levels of the medicine in urine fall below the detection cutoff. In addition, the interval of time between using the drug and also taking a urine check may impact whether level of the drug in the body room high sufficient to trigger a confident test result.

Metabolism also affects the outcome of to pee tests. Every person’s metabolism rate is unique and varies relying on age, gender, ethnicity and also the visibility of liver or kidney impairment. Slow metabolism rates can mean the drug will be existing in the urine for a longer time. People with rapid metabolism rates will break down the medicine quickly, reduce the detection window.


These determinants may result in false positives. In the occasion of a positive test result, physicians should identify if the patient to be prescribed a benzodiazepine and followed instructions because that use.

Blood Tests

Blood exam to identify the existence of benzodiazepines in the human body are much more invasive 보다 urine tests yet are periodically necessary. If a patience is hospitalized, doctors may need to offer a blood test to recognize whether the human is intoxicated v alprazolam.

Blood tests can detect the existence of alprazolam within hours of intake, and also the blood sample may test positive for approximately a job after intake. However, blood test have shorter detection windows than urine tests.

Hair Tests

Detecting benzodiazepines v a hair sample is possible. When a human ingests alprazolam, the drug accumulates in outgrowths of hair follicles throughout the body and also head. Hair testing requires a hair sample that 20 come 50 strands for laboratory analysis. With a test called a benzodiazepine radioimmunoassay, specialists will have the ability to determine the visibility of alprazolam because that up to 4 weeks after ~ intake.

Because that takes roughly one month for one centimeter that hair come grow, hair exam performed in ~ a few days of gulp down may produce inaccurate results. The is more complicated to detect alprazolam through hair tests 보다 to finding long-acting benzodiazepines such as diazepam.

Saliva Tests

A saliva test can detect Xanax for approximately 2.5 days after ingestion. Saliva tests have a longer detection home window than blood tests however a shorter window 보다 urine tests. An enough amount of oral fluid is compelled for saliva tests. They tend to be more costly than urine tests, therefore they space not together common.

Types that Benzodiazepines

Benzodiazepines have the right to be short-, intermediate- or long-acting. The classification depends ~ above the drug’s remove half-life, which defines the length of time until the concentration that the drug in the human body is lessened by one-half.

Short-acting benzos frequently leave the body faster than long-acting ones; they have actually an remove half-life the one come 12 hours. Intermediate-acting benzos have an median elimination half-life that 12 to 40 hours. Long-acting benzos have an remove half-life that 40 to 250 hours.

Benzodiazepine Half-Lives and Time to optimal Level in BloodName or BenzodiazepineTime to peak LevelHalf-Life
Xanax (alprazolam)One to 2 hours12 hours
Lexotan (bromazepam)One to 4 hours20 hours
Librium (chlordiazepoxide)One to 4 hours100 hours
Klonopin (clonazepam)One to four hours34 hours
Tranxene (clorazepate)0.5 to two hours100 hours
Valium (diazepam)One to 2 hours100 hours
Dalmane (flurazepam)0.5 to one hour100 hours
Ativan (lorazepam)One to four hours15 hours
Mogadon (nitrazepam)0.5 to two hours30 hours
Serax (oxazepam)One to 4 hours8 hours
Doral (quazepam)1.5 hours25 to 41 hours
Restoril (temazepam)Two to three hours11 hours
Halcion (triazolam)One to two hours2 hours

Source: Medscape

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Drugs with longer elimination half-lives will continue to be in the mechanism longer. The rate at which benzodiazepines take effect depends ~ above the drug’s capability to cross the blood-brain barrier. Benzos, such as diazepam, that dissolve in fat act much faster than water-soluble benzos, such together lorazepam. The peak blood concentrations of benzos commonly occur within the very first three hours of intake.

One sheep of a fat-soluble benzo will have actually a shorter duration of activity than a comparable dose that a water-soluble benzo. This is mainly due to the fact that of the rapid redistribution from the main nervous device to peripheral sites. If intermediate-acting lorazepam affects the central nervous system much longer than long-acting diazepam does, the last metabolizes into active intermediates with longer half-lives, which extends that is effects. Hence, diazepam remains in the body much longer than lorazepam.

Factors Influencing exactly how Long Alprazolam stays in the Body

Several factors influence exactly how long intermediate-acting alprazolam stays in one individual’s body. If one person may procedure the medicine in three days, a various person might take longer. The clearance rate of a drug relies on separation, personal, instance factors, drug dosage, frequency of use and also other drugs used.

Individual Factors
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Factors such as age, physique, genetics, liver and also kidney function, metabolic rate and also urinary pH affect how lengthy alprazolam continues to be in the system.

Elderly people take much longer than young people to procedure alprazolam from your system, which might be because of a readjust in metabolic rates, transformed blood circulation to the liver or degradation in inner functions.

An individual’s height, weight and body fat percentage may influence the clearance price of alprazolam. A short, lightweight human being will take much longer to clean the drug than a tall, heavyweight person. Compared with the smaller sized person, the larger human being is eating a smaller sized amount in relationship to their body size.

Individuals through impaired liver duty tend to procedure alprazolam more slowly than those v normal liver function. Liver condition and cirrhosis extend alprazolam clearance times.

Drug Dosage

People who take greater doses that alprazolam will certainly take longer than those that take lower doses come excrete the medicine from their system. A common alprazolam dose ranges from 0.25 mg to 4 mg, however sometimes civilization have to exceed the 4 mg dosage because of tolerance, a substance usage disorder or dependence.

Frequency that Use

The frequency of use of alprazolam determines how fast the body purges the drug. Irreversible users will take much longer than those who have used the medicine over a short duration to clean the drug. Emerging a tolerance often causes people to rise their dosage, which extends the detection home window and reasons the medicine to accumulate in a person’s system.

Use of other Drugs

Ingesting various other drugs in ~ the very same time as alprazolam may change the body’s capability to process and excrete the drug. Taking medications such together cimetidine, erythromycin, itraconazole, ketoconazole and also ritonavir may an outcome in delay liver clearance. Oral contraceptives and also SSRIs such together Prozac also hold-up the metabolism and expulsion that alprazolam native the system.

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Similarly, civilization may take drugs to advice the management of alprazolam. Such drugs incorporate carbamezepine, glucocorticoids, phenytoin, progesterone, nafcillin, phenobarbital and St. John’s wort. Studies likewise revealed the smokers may have a slightly higher clearance price than nonsmokers.